Adsorption of methane on the hydrophobic surface of methyl silica in isobaric conditions
DOI:
https://doi.org/10.15407/dopovidi2023.02.083Keywords:
methane, adsorption, hydration, hydrophobic silica, methane hydratesAbstract
Low-temperature 1H NMR spectroscopy was used to study the adsorption of methane on a surface of hydrated hydrophobic silica AM-1-300. It is shown that the adsorption value depends strongly on the hydration and pretreatment of samples. The maximum adsorption of methane (up to 80 mg/g) is observed for a sample rehydrated (h = 0.2 g/g) after complete drying. It is found that methane adsorption is determined by several bound water clusters of R < 2 nm in radius. Based on the shape of the temperature dependence of the methane adsorption, it is assumed that there is both physical adsorption and the formation of solid methane hydrates.
Downloads
References
Holbrook, W. S., Hoskins, H., Wood, W. T., Stephen, R. A. & Lizarralde, D. (1996). Methane hydrate and free gas on the Blake Ridge from vertical seismic profiling. Science, 273, pp. 1840-1843. https://doi.org/10.1126/science.273.5283.1840
Collett, T. S., Lee, M. W., Agena, W. F., Miller, J. J., Lewis, K. A., Zyrianova, M. V., Boswell, R. & Inks, T. L. (2011). Permafrost-associated natural gas hydrate occurrences on the Alaska North Slope. Mar. Pet. Geol., 28, pp. 279-294. https://doi.org/10.1016/j.marpetgeo.2009.12.001
Krey, V., Canadell, J. G., Nakicenovic, N., Abe, Yu., Andruleit, H., Archer, D., Grubler, A., Hamilton, N. T. M., Johnson, A., Kostov, V., Lamarque, J.-F., Langhorne, N., Nisbet, E. G., O’Neill, B., Riahi, K., Riedel, M., Wang,
W. & Yakushev, V. (2009). Gas hydrates: Entrance to a methane age or climate threat. Environ. Res. Lett., 4, 034007. https://doi.org/10.1088/1748-9326/4/3/034007
Turov, V. V. & Gun’ko, V. M. (2011). Clustered water and ways of its use. Kyiv: Naukova Dumka (in Russian).
Gregg, S. J. & Sing, K. S. W. (1982). Adsorption, Surface Area and Porosity. 2nd ed. London: Academic Press.
Derome, E. (1992). Modern NMR methods for chemical research. Moscow: Mir (in Russian).
Gun’ko, V. M., Turov, V. V. & Krupska, T. V. (2018). Interfacial behavior of methane and organic solvents with low freezing points upon interaction with hydrophilic and hydrophobic nanosilicas. Himia, Fizika ta Tehnologia Poverhni, 9, No. 2, pp. 107-123. https://doi.org/10.15407/hftp09.02.107
Gun’ko, V. M., Turov, V. V., Krupska, T. V. & Pakhlov, E. M. (2017). Behavior of water and methane bound to hydrophilic and hydrophobic nanosilicas and their mixture. Chem. Phys. Lett., 690, pp. 25-30. https://doi.org/10.1016/j.cplett.2017.10.039
Gun’ko, V. M., Turov, V. V., Pakhlov, E. M., Krupska, T. V., Borysenko, M. V., Kartel, M. T. & Charmas, B. (2018). Water interactions with hydrophobic versus hydrophilic nanosilica. Langmuir, 34, No. 40, pp. 12145- 12153. https://doi.org/10.1021/acs.langmuir.8b03110
Pat. 138023 UA, IPC G01N13/00, G01N15/00, Method of transferring a mixture of hydrophilic and hydrophobic silica into an aqueous medium by using high mechanical loads, Krupskaya, T.V., Turov, V.V., Gunko, V.M. & Kartel, M.T., Publ. 11.11.2019 (in Ukrainian).
Gun’ko, V. M. & Turov, V. V. (2013). Nuclear magnetic resonance studies of interfacial phenomena. Boca Raton: CRC Press. https://doi.org/10.1201/b14202
Gun’ko, V. M., Turov, V. V., Pakhlov, E. M., Matkovsky, A. K., Krupska, T. V., Kartel, M. T. & Charmas, B. (2018). Blends of amorphous/crystalline nanoalumina and hydrophobic amorphous nanosilica. J. Non-Cryst. Solid., 500, pp. 351-358. https://doi.org/10.1016/j.jnoncrysol.2018.08.020
Aksnes, D. W., Førland, K. & Kimtys, L. (2001). Pore size distribution in mesoporous materials as studied by
H NMR. Phys. Chem. Chem. Phys., 3, pp. 3203-3207. https://doi.org/10.1039/B103228N
Petrov, O. V. & Furó I. (2009). NMR cryoporometry: Principles, applications and potential. Prog. Nucl. Magn. Reson. Spectrosc., 54, pp. 97-122. https://doi.org/10.1016/j.pnmrs.2008.06.001
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Reports of the National Academy of Sciences of Ukraine
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
